Shawne Merriman is going to be a restricted free agent (meaning the Chargers would get draft picks if some other team signs him to a better deal). The Chargers have not been happy with the pass rushing specialist which means the Chargers might put a lower tender than the highest (1st and 3rd round picks).
If the Patritots can get a proven guy like Shawne Merriman for only a second round pick, they would be foolish not to jump all over that. Last year mid way through the year there were rumors that the Pats were trying to trade for the Charger. Merriman would step in right away and be the Pats top pass rusher.
Merriman has been dealing with injuires over the past few seasons and his production has gone down. But if he can stay on the field the guy is a beast.
A Chargers Blog goes into depth on weather San Diego should bring back the OLB or not in this piece.